ToF‐SIMS investigations of the degeneration processes of self‐assembled monolayers of alkanethiols on gold

Sohn, Sang Ho; Schröder, Markus; Lipinsky, D.; Arlinghaus, Heinrich F.

doi:10.1002/sia.1881

Cited by 17 publications

(16 citation statements)

References 6 publications

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“…These peaks included the whole molecule of ODT and are labeled “MS” in Figure 3 with “M” meaning C 18 H 37 . The observed peaks agreed well with those observed in previous ToF‐SIMS measurements of alkanethiol SAMs on gold performed by Offord et al [1994], Sun and Gardella [2002], and Sohn et al [2004].…”

Section: Resultssupporting

confidence: 89%

Products and kinetics of the reactions of an alkane monolayer and a terminal alkene monolayer with NO₃ radicals

Gross¹,

Bertram²

2009

J. Geophys. Res.

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[1] The reactions of an alkanethiol and a terminal alkenethiol self-assembled monolayer with NO 3 radicals (in the presence of NO 2 and O 2 ) were studied. For the alkane monolayer, infrared (IR) spectroscopy and time-of-flight secondary ion mass spectrometry (ToF-SIMS) confirmed the formation of organonitrates (RONO 2 ). The observation of organonitrates is in contrast to the recent X-ray photoelectron spectroscopy (XPS) data, which showed very little nitrogen-containing surface species. The identification of organonitrates may help explain why significant volatilization of the organic chain was not observed in recent studies of alkane monolayer oxidation by NO 3 radicals. The reactive uptake coefficient (g) of NO 3 on alkene monolayers determined in our study is higher than the values obtained in a recent study using liquid and solid alkene bulk films. A possible reason for this difference may be the location of the double bond at the interface. Using the g value determined in our studies, we show that under conditions where NO 3 is high the lifetime of an alkene monolayer in the atmosphere may be short (approximately 20 min). XPS, IR, and ToF-SIMS were used to identify surface functional groups after the oxidation of the alkene monolayers by NO 3 . The results are consistent with the formation of C-O, aldehyde/ketone, carboxylic groups, and nitrogen containing species.Citation: Gross, S., and A. K. Bertram (2009), Products and kinetics of the reactions of an alkane monolayer and a terminal alkene monolayer with NO 3 radicals,

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Section: Resultssupporting

confidence: 89%

Products and kinetics of the reactions of an alkane monolayer and a terminal alkene monolayer with NO₃ radicals

Gross¹,

Bertram²

2009

J. Geophys. Res.

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“…Alkanethiol SAMs (especially DDT) on Au have been studied using ToF‐SIMS 28–34, 37–39. Fragmentation of DDT SAMs on Au provides numerous characteristic ion fragments.…”

Section: Resultsmentioning

confidence: 99%

“…Time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS)23 evolved in recent years as a fast semiquantitative tool for surface analysis24–26 which found applications in the area of thiol SAMs on Au,25, 27–39 and whose results agree well with other analytical techniques,25, 29 and as such, is suitable for the analysis of the composition of mixed SAMs.…”

Section: Introductionmentioning

confidence: 98%

Formation and electrochemical desorption of self‐assembled monolayers as studied by ToF‐SIMS

Tencer¹,

Nie²,

Berini³

2011

Surface & Interface Analysis

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Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was used to study a number of processes involving thiol-based self-assembled monolayers (SAMs) on nontextured (polycrystalline) gold (Au) films deposited on Si wafers. ToF-SIMS turned out to be a convenient and versatile semiqualitative technique which readily verified electrochemical desorption of a SAM and formation of another SAM on the same sample via reincubation with another thiol. The technique, allowing one to follow simultaneously more than one species on the surface, showed that any formation of a mixed SAM on surfaces which did not undergo electrolysis was negligible with the applied time scale (minutes).

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“…It has been shown that the rate of degradation, for instance oxidation to alkanesulfonates, increases rapidly with decreasing alkyl chain length. [20] Furthermore, for short-chain alkanethiol SAMs with n = 3, a randomly initialized degradation plays a major role, whereas for long-chain alkanethiol SAMs, the degradation starts at domain boundaries and defects, propagating into intact domains. Thus, the importance in growing large alkanethiolate domains in order to reduce domain boundaries clearly emerges.…”

Section: Sams Preparation and Qualitymentioning

confidence: 99%

Electrochemical Deposition onto Self‐Assembled Monolayers: New Insights into Micro‐ and Nanofabrication

Schilardi

Dip

Claro

et al. 2005

Chemistry A European J

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Pattern transfer with high resolution is a frontier topic in the emerging field of nanotechnologies. Electrochemical molding is a possible route for nanopatterning metal, alloys and oxide surfaces with high resolution in a simple and inexpensive way. This method involves electrodeposition onto a conducting master covered by a self-assembled alkanethiolate monolayer (SAMs). This molecular film enables direct surface-relief pattern transfer from the conducting master to the inner face of the electrodeposit, and also allows an easy release of the electrodeposited film due their excellent anti-adherent properties. Replicas of the original conductive master can be also obtained by a simple two-step procedure. SAM quality and stability under electrodeposition conditions combined with the formation of smooth electrodeposits are crucial to obtain high-quality pattern transfer with sub-50 nm resolution.

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ToF‐SIMS investigations of the degeneration processes of self‐assembled monolayers of alkanethiols on gold

Cited by 17 publications

References 6 publications

Products and kinetics of the reactions of an alkane monolayer and a terminal alkene monolayer with NO₃ radicals

Products and kinetics of the reactions of an alkane monolayer and a terminal alkene monolayer with NO₃ radicals

Formation and electrochemical desorption of self‐assembled monolayers as studied by ToF‐SIMS

Electrochemical Deposition onto Self‐Assembled Monolayers: New Insights into Micro‐ and Nanofabrication

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ToF‐SIMS investigations of the degeneration processes of self‐assembled monolayers of alkanethiols on gold

Cited by 17 publications

References 6 publications

Products and kinetics of the reactions of an alkane monolayer and a terminal alkene monolayer with NO3 radicals

Products and kinetics of the reactions of an alkane monolayer and a terminal alkene monolayer with NO3 radicals

Formation and electrochemical desorption of self‐assembled monolayers as studied by ToF‐SIMS

Electrochemical Deposition onto Self‐Assembled Monolayers: New Insights into Micro‐ and Nanofabrication

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Products and kinetics of the reactions of an alkane monolayer and a terminal alkene monolayer with NO₃ radicals

Products and kinetics of the reactions of an alkane monolayer and a terminal alkene monolayer with NO₃ radicals